Collapsible lensless finder for folding cameras



' A. D. NORTHRUP.

COLLAPSIBLE LENSLESS FINDER FOR rowms CAMERAS.

APPLICATION FILED JPNE 20, I919- Patented June 29, 1920.

awwmatm UNITED STATES ARTHUR DAVIiD N'QRTH UP,

PATENT OFFICE.

'01? ROCHESTER, new YORK.

conmirsr snn LEnsLEssrINnE FOR romaine CAMERAS;

' Application filed June 20,

To all whom it may concern Be it known that I, ARTHUR D. NoR'rHRUr, a citizen. of the United States, residing at Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Collapsible Lensless Finders for Folding Cameras; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as 1 will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the iletters and figures of reference marked 'plied to a camera, and pictures of objects may be seenlife size, andaifording means whereby the object may be taken while moving rapidly, the device being utilized without lens.

h/ly invention consists of a'simple and efficient device of this character having vari ous other details of construction, combination and arrangement of parts which .will be hereinafter "fully described,'shown in the accompanying drawings and then specifically defined in the appended claims.

I illustrate my invention in the accompanying drawings which, with the numerals of reference marked thereon, form a part of this application, and in which:

Figure l is a perspective view of the finder opened for use,

Fig. 2 is an elevation of the finder folded, and

Fig. 3 is a detail perspective showing the manner .of attachment of the device to a camera box.

- Reference now being had to the details of the drawings by numerals:

1 designates a section of the frame having a circumferential flange 1, said flange having an opening 10, and at the lower por- Specification of Letters Patent. Patented June 29,1920,

1919. Serial No. 305,453.

tion has lugs l" struck up therefrom, which are apertured to receive a pin 1 upon which the clamping members 3 are I pivotally.

mounted and which are provided with resilient fingers3 adapted to clamp the box of a camera when the device is to be adjusted for use. Each of said members has a small lug 3" struck up therefrom and which, when the member is swung, cause an open portion to contactwith the end of the frame.

- It will be noted that-there are two of said resilient members, one upon either side, and

which, when not in use, may be folded against the solid portion of the frame, as shown in Fig. 2 of the drawings.

Pivotally mounted on one of the ins is a gage member 2 which has a swinging movement on the pivot on which it is mounted. Pivoted to the flange l is a link 5 which in turn is pivoted to a link 5, and

which in turn is pivoted to a flange of the frame, which latter is provided with'a central opening 8 directly opposite and centrally in alinement with the center of' the opening 10. A stop 5 is mounted upon the link 5 and is adapted to form a stop against which the arm 5 contacts when thelinks are drawn tothe position shown in Fig. 1 of the drawings. Other links 4 are pivotally connected through the medium of the pins 4 with the side flanges of the frame 1, and are pivotallyconnected to the links 4 which in turn are pivotally connected to the angled ends of arms upon the frame 2..

Each link 4 has a lug 4 struck up from one edge thereof adapted to engage a notchl formed inthe link 4 and tending to limit the throw of ,said links 4 and 4 causing the same to be held with their opposite edges parallel and in the position shown in Fig. 1 of the drawings. The plate 2 is provided with aflange 2 and its lower end is adapted to contact with the camera box.

In operation, when the device is opened up in the manner shown in Fig. 1 of the drawings, the fingers of the resilient members 3 clamp. and hold the finder upon the camera frame, the object to be photographed being seen life size with the naked eye, but looking through the circular outlined opening 8 in the plate 2 seeing the object outlined by the opening 10 in the frame 1.

In order to center the finderrelative to the door opening, the gage finger which is made of proper length, so that when the point thereof is brought to the corner of the opening, as shown in Fig. 3 of the drawings,-the-finder will'be exactly in the center of the side and direct line of lens of the camera. It willbe understood that the finger point which is pivoted to the finder will be made to conform to different sizes of folding cameras.

By the provision of my improved collapsible instantaneous lensless finder, a

simple device is afforded which may be. applied toa camera and;held against either eye which may look straight through the small circular aperture of the finder and within the field of the larger aperture of the finder may be focused quicklyand with certaintyof distinct outline and which will re- .duce to a minimum the waste of films heretofore' experienced. with finders commonly produced.

' Whenthefinder is not in use, it is removled fromythe cameraand folded into a collapsed form, shown in Fig. 5 of the drawings, making a compact frame which may be easily carried in the vest pocket and always ready for use.

What I claim to be new is:

'1. A collapsible instantaneous lensless finder for folding cameras, comprising a frame withan opening therein, and resilient means thereon for clamping the. same upon the frame of a camera, an apertured plate having pivotal :link connections with said frame and through the aperture of which plate an object to be photographed is adapt ed, to be seen through the frame.

2. VA collapsible instantaneous finder for folding cameras, comprising a frame with an opening therein, and resilient means thereon for clamping the same upon the frame of a camera, an apertured plate having pivotal link connections with said frame and through the aperture of which plate an object to be photographed is adapted to be seen through the frame, and a gage pointer pivoted to the frame.

3. A collapsible instantaneous lensless lensless finder for folding'cameras, comprising a frame with an opening therein, and lugs struck up fromits edges, members-pivoted to said lugs and having resilient fingers spaced apart adapted to frictionally clamp the frame of a camera, a gage finger pivoted to said frame, an apertured plate with an opening centrally in alinement with the opening in said frame, and links pivotally connecting said plate and frame.

4;. A' collapsible instantaneous lensless finder for folding cameras, comprising a.

tweensaid angled ends and the flanges of said frame,.means for limiting the movements of said links.

5. A collapsible instantaneous lensless.

finder for foldingv cameras, comprising a frame with an opening therein, and provided with'fianges, said frame having lugs struck up therefrom, resilient me mbers piv-v otally mounted upon said lugs, and means for limiting the outer throw of said members, each member having clamping arms spaced apart, a pivoted gage pointer,aplate with an opening centrally in alinement'with the opening in said frame, thevends of said plate having. laterally extending, arms with angled ends, pivotal link connections between said angled ends and the' flanges of said frame, means for limiting the movements of said links, the bottom of said plate.

having an angled flange adaptedv to rest upon the frame of a camera.

In testimony whereof I hereunto my signature. ARTHUR DAVID NO-RTHRUP. 

